/* 咨询 */
.stibtn{
    position: relative;
    width: auto;
    background-color: #ff6699;
    /* 方块变圆 */
    border-radius: 50%;
    /* 阴影效果 */
    box-shadow: 0px 6px 10px 0px rgb(0 0 0 / 25%);
    /* 定位元素 */
    position: fixed;
    max-width: 70px;
    max-height: 70px;
    right: 30px;
    bottom: 24px;
    cursor: pointer;
    overflow: visible;
    filter: alpha(opacity=100);
    opacity: 1;
    z-index: 999;
}
.stibtn img{
    width: 100%;
    height: 100%;
}